103 lines
2.4 KiB
JavaScript
103 lines
2.4 KiB
JavaScript
//= require ../lib/_lunr
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//= require ../lib/_jquery
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//= require ../lib/_jquery.highlight
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;(function () {
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'use strict';
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var content, searchResults;
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var highlightOpts = { element: 'span', className: 'search-highlight' };
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var searchDelay = 0;
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var timeoutHandle = 0;
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var index;
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function populate() {
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index = lunr(function(){
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this.ref('id');
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this.field('title', { boost: 10 });
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this.field('body');
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this.pipeline.add(lunr.trimmer, lunr.stopWordFilter);
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var lunrConfig = this;
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$('h1, h2').each(function() {
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var title = $(this);
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var body = title.nextUntil('h1, h2');
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lunrConfig.add({
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id: title.prop('id'),
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title: title.text(),
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body: body.text()
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});
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});
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});
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determineSearchDelay();
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}
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$(populate);
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$(bind);
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function determineSearchDelay() {
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if (index.tokenSet.toArray().length>5000) {
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searchDelay = 300;
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}
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}
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function bind() {
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content = $('.content');
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searchResults = $('.search-results');
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$('#input-search').on('keyup',function(e) {
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var wait = function() {
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return function(executingFunction, waitTime){
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clearTimeout(timeoutHandle);
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timeoutHandle = setTimeout(executingFunction, waitTime);
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};
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}();
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wait(function(){
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search(e);
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}, searchDelay);
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});
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}
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function search(event) {
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var searchInput = $('#input-search')[0];
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unhighlight();
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searchResults.addClass('visible');
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// ESC clears the field
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if (event.keyCode === 27) searchInput.value = '';
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if (searchInput.value) {
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var results = index.search(searchInput.value).filter(function(r) {
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return r.score > 0.0001;
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});
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if (results.length) {
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searchResults.empty();
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$.each(results, function (index, result) {
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var elem = document.getElementById(result.ref);
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searchResults.append("<li><a href='#" + result.ref + "'>" + $(elem).text() + "</a></li>");
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});
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highlight.call(searchInput);
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} else {
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searchResults.html('<li></li>');
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$('.search-results li').text('No Results Found for "' + searchInput.value + '"');
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}
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} else {
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unhighlight();
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searchResults.removeClass('visible');
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}
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}
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function highlight() {
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if (this.value) content.highlight(this.value, highlightOpts);
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}
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function unhighlight() {
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content.unhighlight(highlightOpts);
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}
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})();
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